Concrete working machine



Dec. 27, 1938. CJACKSON 2,141,301

CONCRETE WORKING MACijIINE Filed June '29, 1956 1 N VENTOR.

\/ b 6 4 ATTORNEY!) Patented Dec. 27,1938

UNITED STATES PATENT OFFICE 11 Claims.

This invention relates to improvements in con crete working machines.

The main objects of this invention are:

First, to provide a machine for vibrating concrete pavements or beds ofconcrete at the joint thereof.

Second, to provide a machine for use in the placement of concrete pavingand the like in which the concrete is effectively vibrated at the jointsto properly embed the reinforcing and doweling elements and toeffectively vibrate the concrete around the joint elements.

Third, to provide a machine having these ad-- vantages which is veryconvenient in its manipulation and highly efllcient for the purpose andalso one which is of large capacity,

Objects relating to details and economies of the invention will appearfrom the description. to follow. The invention is defined and pointedout in the claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawing, in which:

Fig. 1 is a side view of my improved concrete working machine, partsbeing broken away and shown in vertical section, the machine being shownin operative relation to a slab of concrete.

Fig. 2 is a fragmentary end view, the machine being illustrated inoperative relation to a pavement Joint of one type.

In the accompanying drawing, 1 represents a side form of a pavement and2 designates a pavement or bed of concrete and 3, 3 adjacent pavingslabs having reinforcing rods 4 therein and dowel pins 5.

Between the paving slabs are joint members 6, a cap or protecting filler'I being provided for the joint. While I have illustrated one particulartype of joint, it will be understood that this has 40 been done merelyto show the adaptability of the machine and that the machine is adaptedfor use in the placement of concrete highwaysfor example, having anytype of joint.

. My concrete treating machine comprises a pair 45 of shoes 8 disposedin parallel relation and connected by the angle iron cross bars 9. Theshoes are rigidly held in spaced relation so that they rest upon theslabs or bed of concrete at opposite sides of the joint which it isdesired to vibrate.

.On these shoes I mount a vibrating member or unit, the embodimentillustrated comprising a cylindrical housing l0 having a base plate I Imounted on the shoes centrally thereof-that is, centrally relative totheir length with the housing 66 centrally transversely of the shoes.

In this housing I mount a shaft or rotor It, the shaft being supportedby the bearings l3 so that vibrations of the shaft are imparted to thehousing and thereby to the shoes.

The shaft is provided with an unbalancing 5v weight comprising a pair ofmembers [I adjustably associated witheach other so that by shiftingrelative to each other the amount or degree of vibration can becontrolled. The members are connected in their adjusted position bymeans of lo bolts l5 engaging slots in the members, the details of thisnot being illustrated.

The shaft is provided with a pulley l6 receiving the belt H from thedriving wheel I8 of the motor l9 preferably an internal combustionengine as is 1.3 illustrated in the accompanying drawing. This motor ismounted on a base 20, the base being mounted on the shoes by means ofthe flexible supports 2|. These flexible supports are in the form ofrelatively heavy tubing or hose, the outer 20 ends of which are engagedon the coupling members 22 carried by the angled brackets 23. The motorbase is provided with angled brackets 24 having coupling members 25which project into the opposite end of these resilient supports, the 5resilient supports being clamped upon the coupling members by means ofthe clamp 26 which is similar to a hose clamp. This provides aneffective cantilever support for the motor and relieves it of thevibration imparted to the shoes by the 30 vibrating means. They are inefiect shock or vibration absorbers.

Upwardly diverging handles 21 are mounted on the motor base and projectto such height that they can be conveniently grasped by workmen 5standing at either side of the shoes.

The shoes are provided with eye-bolts 28 at each end to which the ropesor cables 29 are connected to permit the machine being drawn back andforth across a pavement with its shoes astride a joint thereby vibratingthe joint or the concrete at the joint without the necessity of aworkman standing or walking upon the concrete.

The machine may be drawn or lifted off the concrete and transported fromjoint to joint.

My concrete workingv machine is very' eifective for the working ortreatment of joints; the concrete is effectively vibrated and compactedand worked around the reinforcing and joint elements and voidseliminated even where the joint members are provided with laterallyprojectingflanges as indicated at 30, Fig. 2.

I have illustrated and describedmy improvements in a very practicalembodiment thereof. I

have not attempted to illustrate or describe cer- 66 tain otherembodiments or adaptations which I contemplate as it is believed thatthis disclosure will enable those skilled in the art to which myinvention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a machine of the class described, the combination of shoesdisposed in spaced parallel relation to straddle a pavement joint, crossmembers connecting said shoes, a vibrating member comprising a housingprovided with a base mounted on said shoes centrally thereof, a shaftmounted in said housing in parallel relation to said shoes and providedwith an unbalancing weight, said shaft being centrally disposed relativeto said shoes, a motor, a motor base, opposed supports for said motorbase disposed in alinement with said shaft and comprising tubularmembers of resilient material mounted at their outer ends on said shoecross members, said motor base being mounted on the inner ends of saidsupports, a driving connection for said motor to said shaft, opposedupwardly diverging handles on said motor base, and propelling means ateach end of said shoes.

2. In a machine of the class described, the combination of shoesdisposed in spaced parallel relation to straddle a pavement joint, crossmembers connecting said shoes, a vibrating member comprising a housingprovided with a base mounted on said shoes centrally thereof, a shaftmounted in said housing in parallel relation to said shoes and providedwith an unbalancing weight, said shaft being centrally disposed relativeto said cross, a motor, a motor base, opposed supports for said motorbase disposed in alinement with said shaft and comprising tubularmembers of resilient material mounted at their outer ends on said shoecross members, said motor base being mounted on the inner ends of saidsupports, and a driving connection for said motor to said shaft.

3. In a machine of the class described, the combination of shoesdisposed in spaced parallel relation to straddle a pavement joint, avibrating member comprising a housing provided with a base mounted onsaid shoes centrally thereof, a shaft mounted in said housing inparallel relation to said shoes and provided with an adjustableunbalancing weight, said shaft being centrally disposed relative to saidshoes, a motor, a motor base, opposed supports for said motor basedisposed in alinement with said shaft and comprising tubular members ofresilient material mounted on said shoes, said motor base being mountedon the other ends of said supports, and a driving connection for saidmotor to said shaft.

4. In a machine of the class described, the combinationof shoes disposedin spaced parallel relation to straddle a pavement joint, a vibratingmember comprising a housing provided with a base mounted on said shoescentrally thereof, a shaft mounted in said housing in parallel relationto said shoes and provided with an unbalancing weight, said shaft beingcentrally disposed relative to said shoes, a motor, a motor base,opposed supports for said motor base disposed in alinement with saidshaft and comprising tubular members of resilient material mounted onsaid shoes, said motor base being mounted on the other ends of saidsupports, and a driving connection for said motor to said shaft.

5. In a machine of the class described, the

combination of shoes disposed in spaced parallel relation, a vibratingmember mounted centrally between said shoes and comprising a shaftdisposed longitudinallythereof and provided with an unbalancing weight,a motor mounted on said shoes, vibration absorbing means for supportingsaid motor on said shoes comprising a pair of laterally extendingresilient members each fixedly secured at one end to the shoes andsupporting the motor at the other end, driving connections for saidmotor to said shaft, and handles connected above said vibrationabsorbing means and positioned to be grasped by workmen at the sides ofthe shoes.

6. In a machine of .the class described, the combination of shoesdisposed in spaced parallel relation, a vibrating member mountedcentrally between said shoes and comprising a shaft disposedlongitudinally thereof and provided with an unbalancing weight, a motormounted on said shoes, means for supporting the motor on the shoescomprising a pair of resilient members each secured to the shoes and tothe motor, and driving connections for said motor to said shaft.

'7. In a machine of the class described, the combination of shoesdisposed in spaced relation, a vibrating member mounted on said shoes, amotor mounted on said shoes, means for supporting said motor on saidshoes comprising a motor supporting base and resilient cantilevermembers fixedly connected at one end to said shoes and at the other endto said base, and driving connections for said motor to said vibratingmember. I

8.'I.n a machine of the class described, the combination of a shoeadapted to engage a bed of cement for vibrating the same, means forvibrating the shoe comprising a rotor attached to the shoe, a motor fordriving the rotor, means for resiliently supporting said motor on theshoe comprising a motor supporting base, brackets carried by said baseand shoe respectively, a pair of flexible tubular cantilever memberseach fixedly connected at one end to said shoe brackets and at the otherto said base brackets, and means for drivingly connecting said rotor tosaid motor.

9. In a machine of the class described, the combination of a shoeadapted to engage a bed of cement for vibrating the same, means forvibrating the shoe comprising a motor, means for resiliently supportingsaid motor on the shoe comprising a motor supporting base, bracketscarried by said base and shoe respectively, and a pair of flexibletubular cantilever members each fixedly connected at one end to saidshoe brackets and at the other to said base brackets.

10. In a machine of the class described, the combination of a shoeadapted to engage a bed of cement for vibrating the same, means forvibrating the shoe comprising a motor, and means for supporting saidmotor on the shoe comprising a motor supporting base, brackets carriedby said base and shoe respectively, and a flexible cantilever memberfixedly connected at one end to said shoe bracket and at the other tosaid base bracket.

11. In a machine of the class described, the combination of a shoeadapted to engage a bed of cement for vibrating the same, means forvibrating the shoe comprising a motor, and means for supporting saidmotor on the shoe comprising a flexible cantilever member fixedlyconnected at one end to said shoe and at the other to said motor.

COBWILL JACKSON.

